CN107512904A - A kind of high-strength steel non-carbon residue feather edge brick - Google Patents

A kind of high-strength steel non-carbon residue feather edge brick Download PDF

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CN107512904A
CN107512904A CN201710757105.5A CN201710757105A CN107512904A CN 107512904 A CN107512904 A CN 107512904A CN 201710757105 A CN201710757105 A CN 201710757105A CN 107512904 A CN107512904 A CN 107512904A
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parts
powder
additive
carbon residue
feather edge
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江群英
施永益
张新财
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Zhejiang Panxi Metallurgical Material Co Ltd
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Zhejiang Panxi Metallurgical Material Co Ltd
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    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
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    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
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Abstract

The present invention relates to a kind of high-strength steel non-carbon residue feather edge brick, including solid material and additive, the solid material includes：Micropore corundum in granules, micropore schmigel, ρ Al2O3Micro mist, xenotime, synthetic spinel powder, fine silica powder and rear-earth-doped oxidation magnesium PSZ micro mist, the additive include combined binder and additive, and the dosage of the additive is solid material gross weight 1 3%.Micropore corundum main function in the present invention reduces stress concentration, improves the thermal shock resistance energy of product to reduce product thermal conductivity.Synthetic spinel main function is to improve product resistance to slag corrosion；Magnesium aluminate and the normal temperature strength that water main function is raising product.Therefore, there is pollution-free, normal temperature using the obtained steel non-carbon residue feather edge brick of raw material proportioning of the present invention and elevated temperature strength is big, good thermal shock stability, the production requirement of low-carbon, ultra-low-carbon steel can be met.

Description

A kind of high-strength steel non-carbon residue feather edge brick
Technical field
The invention belongs to fire resisting material field, more particularly to a kind of anti-erosion, resistance to thermal shock, wear-resistant, the coefficient of expansion is small, changes Learn the good high-strength steel non-carbon residue feather edge brick of stability.
Background technology
With developing rapidly for China's industry, the high purity steel such as mild steel, ultra-low-carbon steel kind is with its excellent performance, in vapour The application of the industries such as car, household electrical appliances, electric power is more and more wider, and the net steel of smelting high-purity turns into the main direction of development of large iron and steel enterprise. As one of process very crucial in steelmaking process, its is purifying to be particularly important ladle metallurgy, and ladle is with containing Carbon material can cause molten steel recarburization, and pollution is larger, therefore, need to develop pollution-free, the high life ladle Carbon-free refractories, with Meet the smelting requirements of the high purity steels such as mild steel, ultra-low-carbon steel.
The carbon-free ladle brick mode of production has two kinds, moulding by casting and mechanical pressing.Moulding by casting without the carbon brick production cycle Long, complex process, quality is difficult to ensure that；Mechanical pressing without carbon brick simple production process, production efficiency is high, and application is wider.
At present, ladle machine pressure can use organic system to combine and be combined with Inorganic system without carbon brick, but generally existing heat The problem of shaking less stable.The machine pressure of combination system still contains a certain amount of carbon without carbon brick, can cause dirt to molten steel Dye.
The patent hair that Patent Office of the People's Republic of China disclosed a kind of zirconia refractory and preparation method thereof on December 2nd, 2015 It is bright, patent publication No. CN105110790A, the present solution provides one kind by zirconia material, nano aluminium oxide, graphene, Titanium oxide, carborundum, boron carbide, nano magnesia, Nanometer-sized Neodymium Oxide, diatom ooze, boron nitride, glass microballoon, nano zine oxide The zirconia refractory and its preparation technology prepared for raw material, the materials'use zirconia material are incited somebody to action as matrix but not to it Occur occur asking for monocline phase zircite and tetragonal phase zirconium oxide two-phase coefficient of thermal expansion mismatch during use is heated at high temperature Topic is adjusted and planned, therefore the material will occur to produce underbead crack after more multiple thermal shock, cause serious thermomechanical Hydraulic performance decline, service life is impacted.
The content of the invention
It is an object of the invention to provide one kind to solve the defects of existing steel non-carbon residue feather edge brick thermal shock resistance difference A kind of anti-erosion, resistance to thermal shock, the high-strength steel non-carbon residue feather edge brick that wear-resistant, the coefficient of expansion is small, chemical stability is good.
To achieve these goals, the present invention uses following technical scheme：
A kind of high-strength steel non-carbon residue feather edge brick, including solid material and additive, the solid material include in parts by weight Following component：Micropore corundum in granules 120-135 parts, micropore schmigel 45-65 parts, ρ-Al2O3Micro mist 12-17 parts, xenotime 3-5 Part, synthetic spinel powder 20-35 parts, fine silica powder 3-7 parts and rear-earth-doped oxidation magnesium PSZ micro mist 3-5 Part, the additive includes combined binder and additive, and the dosage of the additive is solid material gross weight 1-3%.
In the technical program, using rear-earth-doped oxidation magnesium PSZ micro mist as discrete phase compared with general Logical magnesia partial stabilized zirconia has higher thermal shock resistance as matrix, and material mechanical performance has been after a thermal shock Decline, but significantly rise in the mechanical property of subsequent multiple thermal shock material and only exist fluctuation within a narrow range afterwards, it is overall Mechanical property, which does not decline, also not to be risen, stable performance.
Preferably, the mass percent of the micropore corundum in granules and the chemical constituent of micropore schmigel is：Al2O3 Content >=98.5%, Fe2O3Content≤1.0%, K2O+Na2O content≤0.8%.SiO2Content≤0.5%.
Preferably, the micropore corundum in granules is made up of two kinds of particles grading, described two grain compositions and its weight Degree is：45% granularity is 1-3mm micropores corundum in granules, 55% granularity is 0.088-1mm micropore corundum in granules.
Preferably, the granularity of the synthetic spinel powder is 180 mesh, the mass percent of its chemical constituent is：Al2O3 Content be 82%, MgO content be 18%.
Preferably, the fine silica powder chemical analysis requires SiO2>=95.0%, Particle size requirements≤1 μm.
Preferably, additive is superfine powdery Y-PSZ, the preparation process of the superfine powdery Y-PSZ is as follows：
A) the nitric hydrate yttrium of 18-22 parts six, the water basic zirconium chloride of 90-110 parts eight are codissolved in water, dilution is until zirconium ion rubs Your concentration is 0.054-0.056mol/L, obtains mixing salt solution；
B) 0.8-1.2 part surfactants are added into mixing salt solution a) obtained, ammoniacal liquor is added dropwise to it after uniform stirring, PH value is adjusted to 7.8-8.5, milky white precipitate is produced, obtains aqueous precipitating solution；
C) by aqueous precipitating solution b) obtained and petroleum ether with volume ratio 1：0.8-1.2 ratio mixing, mixed system is transferred to Stood in water and oil separator, until precipitation is all extracted in petroleum ether, discard its lower portion aqueous solution, retain organic molten Liquid；
D) precipitation is taken out from organic solution c) obtained, precipitation is dried after deionized water rinsing, dried after terminating Calcining obtains superfine powdery Y-PSZ under the conditions of being deposited in 750-850 DEG C.In the technical program, superfine powdery Y-PSZ is a kind of Yittrium oxide PSZ material, Y-PSZ addition be greatly improved between material grains at high temperature directly in conjunction with Degree, yittrium oxide causes Zirconia-stabilized property increase, and reduces each phase in version difficulty of zirconium oxide, and powdery row material characteristic is to part in addition The performance of stabilizing zirconia has highly important influence.
Preferably, the preparation process of the rear-earth-doped oxidation magnesium PSZ micro mist is as follows：
A) by 94-95.5 part monocline phase zircites, 2.8-3.5 part fused magnesite fine powders, 1.3-2 part high alumina alum in terms of parts by weight Native micro mist, 0.18-0.25 parts praseodymium nitrate and the mixing of 0.18-0.25 parts lanthanum nitrate are after wet ball grinding under the conditions of 100-110 DEG C 40-50min is dried, obtains precursor powder；
B) 70-80min is calcined under the conditions of precursor powder a) obtained being placed in into 750-770 DEG C, air cools down to obtain adulterated powder；
C) powder is filtered out by adulterated powder b) obtained after distilled water immersion 3-5min with filter paper, powder is placed in 100- 40-50min is dried under the conditions of 110 DEG C, and rear-earth-doped oxidation magnesium PSZ micro mist is obtained after crossing 200 mesh sieves.
Preferably, the mass ratio of combined binder and additive is 1:1.2-1.5, combined binder are solid MgCl2·6H2O and MgCl2·6H2The O aqueous solution, solid MgCl2·6H2O and MgCl2·6H2The mass ratio of the O aqueous solution is 1:3, MgCl2·6H2O aqueous solution proportion is 1.5-1.65.
In the technical program, for magnesium salt solution as the bonding agent without carbon brick, it condenses hardening principle mainly due to chlorine Change magnesium (MgCl2·6H2O magnesium oxychioride) is generated with oxidation reactive magnesium, and because the presence of magnesium chloride makes magnesia Fast Persistence Ground aquation generation Mg (OH)2Caused by, its reaction equation is：
MgO+MgCl2+H2O→xMgO·yMgCl2·2H2O
MgO+H2O→Mg(OH)2。
Beneficial effects of the present invention：
1) it is of the invention without carbon brick with good high temperature resistant, anti-erosion, it is wear-resistant, with good mechanical property, thermostabilization Property and thermal shock resistance；By introducing rare earth element, optimization design, no carbon brick is set effectively to overcome the institutional framework in high temperature originally It is not fine and close, low intensity, the not strong weakness of resistance molten steel erosiveness, sintering is effectively facilitated when using for 1400-1600 DEG C, makes brick The consistency of base greatly improves, intensity increase, so as to ensure that resistance molten steel erosiveness significantly improves；
2) the micropore corundum main function in the present invention reduces stress concentration, improves the heat of product to reduce product thermal conductivity Shake stability.ρ-Al2O3Micro mist main function improves the adhesion strength of product, at the same with magnesium aluminate in-situ preparation at high temperature Spinelle, improve the thermal shock resistance energy and anti-scour property of product；Synthetic spinel main function is to improve product anti-slag Aggressivity；Magnesium aluminate and the normal temperature strength that water main function is raising product.Therefore, obtained using the raw material proportioning of the present invention Steel non-carbon residue feather edge brick has the characteristics that pollution-free, normal temperature and elevated temperature strength be big, good thermal shock stability, can meet low-carbon, Ultra-low carbon The production requirement of steel.
Embodiment
Below in conjunction with specific embodiment, the present invention is further explained, not to the limitation of its protection domain.
In the present invention, if not refering in particular to, used raw material is commercially available or commonly used in the art, following implementations Method in example, is the conventional method of this area unless otherwise instructed.
The mass percent of micropore corundum in granules and the chemical constituent of micropore schmigel is：Al2O3Content >= 98.5%, Fe2O3Content≤1.0%, K2O+Na2O content≤0.8%.SiO2Content≤0.5%.
Micropore corundum in granules is made up of two kinds of particles grading, and described two grain compositions and its weight percent content are： 45% granularity is 1-3mm micropores corundum in granules, 55% granularity is 0.088-1mm micropore corundum in granules.
The granularity of synthetic spinel powder is 180 mesh, and the mass percent of its chemical constituent is：Al2O3Content be 82%, MgO content is 18%.
Fine silica powder chemical analysis requires SiO2>=95.0%, Particle size requirements≤1 μm.
Embodiment 1
A kind of high-strength steel non-carbon residue feather edge brick, including solid material and additive, the solid material include in parts by weight Following component：120 parts of micropore corundum in granules, 45 parts of micropore schmigel, ρ-Al2O312 parts of micro mist, 3 parts of xenotime, synthetic spinel Powder 20- parts, 3 parts of fine silica powder aoxidize 3 parts of magnesium PSZ micro mist with rear-earth-doped, and the additive includes multiple Bonding agent and additive are closed, the dosage of the additive is solid material gross weight 1%.
Additive is superfine powdery Y-PSZ, and the preparation process of the superfine powdery Y-PSZ is as follows：
A) 18 part of six nitric hydrate yttrium, 90 part of eight water basic zirconium chloride are codissolved in water, dilution is until the molar concentration of zirconium ion For 0.054mol/L, mixing salt solution is obtained；
B) 0.8 part of surfactant is added into mixing salt solution a) obtained, ammoniacal liquor is added dropwise to it after uniform stirring, is adjusted PH value produces milky white precipitate, obtains aqueous precipitating solution to 7.8；
C) by aqueous precipitating solution b) obtained and petroleum ether with volume ratio 1：0.8 ratio mixing, mixed system is transferred to water oil Stood in separator, until precipitation is all extracted in petroleum ether, discard its lower portion aqueous solution, retain organic solution；
D) precipitation is taken out from organic solution c) obtained, precipitation is dried after deionized water rinsing, dried after terminating Calcining obtains superfine powdery Y-PSZ under the conditions of being deposited in 750 DEG C.
The preparation process of the rear-earth-doped oxidation magnesium PSZ micro mist is as follows：
A) in terms of parts by weight by 94 parts of monocline phase zircites, 2.8 parts of fused magnesite fine powders, 1.3 parts of alumine micro mists, 0.18 Part praseodymium nitrate and 0.18 part of lanthanum nitrate mixing dry 40min after wet ball grinding under the conditions of 100 DEG C, obtain precursor powder；
B) precursor powder a) obtained is placed under the conditions of 750 DEG C and is calcined 70min, air cools down to obtain adulterated powder；
C) powder is filtered out by adulterated powder b) obtained after distilled water immersion 3min with filter paper, powder is placed in 100 DEG C of bars 40min is dried under part, and rear-earth-doped oxidation magnesium PSZ micro mist is obtained after crossing 200 mesh sieves.
The mass ratio of combined binder and composite mineralizer is 1:1.2, combined binder is solid MgCl2·6H2O with MgCl2·6H2The O aqueous solution, solid MgCl2·6H2O and MgCl2·6H2The mass ratio of the O aqueous solution is 1:3, MgCl2·6H2O water Gravity is 1.5.
Embodiment 2
A kind of high-strength steel non-carbon residue feather edge brick, including solid material and additive, the solid material include in parts by weight Following component：125 parts of micropore corundum in granules, 52 parts of micropore schmigel, ρ-Al2O315 parts of micro mist, 4 parts of xenotime, synthetic spinel 23 parts of powder, 5 parts of fine silica powder aoxidize 4 parts of magnesium PSZ micro mist with rear-earth-doped, and the additive includes multiple Bonding agent and additive are closed, the dosage of the additive is solid material gross weight 2%.
Additive is superfine powdery Y-PSZ, and the preparation process of the superfine powdery Y-PSZ is as follows：
A) 20 part of six nitric hydrate yttrium, 95 part of eight water basic zirconium chloride are codissolved in water, dilution is until the molar concentration of zirconium ion For 0.055mol/L, mixing salt solution is obtained；
B) 1 part of surfactant is added into mixing salt solution a) obtained, it is added dropwise after uniform stirring ammoniacal liquor, adjusts pH It is worth 8, produces milky white precipitate, obtain aqueous precipitating solution；
C) by aqueous precipitating solution b) obtained and petroleum ether with volume ratio 1：1 ratio mixing, water oil is transferred to by mixed system From being stood in device, until precipitation is all extracted in petroleum ether, its lower portion aqueous solution is discarded, retains organic solution；
D) precipitation is taken out from organic solution c) obtained, precipitation is dried after deionized water rinsing, dried after terminating Calcining obtains superfine powdery Y-PSZ under the conditions of being deposited in 800 DEG C.
The preparation process of the rear-earth-doped oxidation magnesium PSZ micro mist is as follows：
A) in terms of parts by weight by 95 parts of monocline phase zircites, 3 parts of fused magnesite fine powders, 1.5 parts of alumine micro mists, 0.2 part Praseodymium nitrate and 0.22 part of lanthanum nitrate mixing dry 45min after wet ball grinding under the conditions of 105 DEG C, obtain precursor powder；
B) precursor powder a) obtained is placed under the conditions of 760 DEG C and is calcined 75min, air cools down to obtain adulterated powder；
C) powder is filtered out by adulterated powder b) obtained after distilled water immersion 4min with filter paper, powder is placed in 105 DEG C of bars 45min is dried under part, and rear-earth-doped oxidation magnesium PSZ micro mist is obtained after crossing 200 mesh sieves.
The mass ratio of combined binder and composite mineralizer is 1:1.3, combined binder is solid MgCl2·6H2O with MgCl2·6H2The O aqueous solution, solid MgCl2·6H2O and MgCl2·6H2The mass ratio of the O aqueous solution is 1:3, MgCl2·6H2O water Gravity is 1.55.
Embodiment 3
A kind of high-strength steel non-carbon residue feather edge brick, including solid material and additive, the solid material include in parts by weight Following component：135 parts of micropore corundum in granules, 65 parts of micropore schmigel, ρ-Al2O317 parts of micro mist, 5 parts of xenotime, synthetic spinel 35 parts of powder, 7 parts of fine silica powder aoxidize 5 parts of magnesium PSZ micro mist with rear-earth-doped, and the additive includes multiple Bonding agent and additive are closed, the dosage of the additive is solid material gross weight 3%.
Additive is superfine powdery Y-PSZ, and the preparation process of the superfine powdery Y-PSZ is as follows：
A) 22 part of six nitric hydrate yttrium, 110 part of eight water basic zirconium chloride are codissolved in water, dilution is until the molar concentration of zirconium ion For 0.056mol/L, mixing salt solution is obtained；
B) 1.2 parts of surfactants are added into mixing salt solution a) obtained, ammoniacal liquor is added dropwise to it after uniform stirring, are adjusted PH value produces milky white precipitate, obtains aqueous precipitating solution to 8.5；
C) by aqueous precipitating solution b) obtained and petroleum ether with volume ratio 1：1.2 ratio mixing, mixed system is transferred to water oil Stood in separator, until precipitation is all extracted in petroleum ether, discard its lower portion aqueous solution, retain organic solution；
D) precipitation is taken out from organic solution c) obtained, precipitation is dried after deionized water rinsing, dried after terminating Calcining obtains superfine powdery Y-PSZ under the conditions of being deposited in 850 DEG C.
The preparation process of the rear-earth-doped oxidation magnesium PSZ micro mist is as follows：
A) in terms of parts by weight by 95.5 parts of monocline phase zircites, 3.5 parts of fused magnesite fine powders, 2 parts of alumine micro mists, 0.25 Part praseodymium nitrate and 0.25 part of lanthanum nitrate mixing dry 50min after wet ball grinding under the conditions of 110 DEG C, obtain precursor powder；
B) precursor powder a) obtained is placed under the conditions of 770 DEG C and is calcined 80min, air cools down to obtain adulterated powder；
C) powder is filtered out by adulterated powder b) obtained after distilled water immersion 5min with filter paper, powder is placed in 110 DEG C of bars 50min is dried under part, and rear-earth-doped oxidation magnesium PSZ micro mist is obtained after crossing 200 mesh sieves.
The mass ratio of combined binder and composite mineralizer is 1:1.5, combined binder is solid MgCl2·6H2O with MgCl2·6H2The O aqueous solution, solid MgCl2·6H2O and MgCl2·6H2The mass ratio of the O aqueous solution is 1:3, MgCl2·6H2O water Gravity is 1.65.
No carbon brick is made by existing process to embodiment 1-3 formula to detect, table 1 be embodiment prepare without carbon brick The test paper of physical and chemical index.
Table 1
Test event Unit Embodiment 1 Embodiment 2 Embodiment 3
Bulk density g·cm-3 3.12 3.22 3.14
Strength at normal temperature MPa 9.8 9.2 8.9
Cold crushing strength MPa 65.1 58.2 58.3
High temperature folding strength MPa 2.75 2.31 2.25
Strength at normal temperature before thermal shock MPa 9.8 9.2 8.9
Strength at normal temperature after thermal shock MPa 8.7 7.6 7.3
Rupture strength conservation rate % 88.8 82.1 82.0
Thermal shock resistance test condition is 950 DEG C, air-cooled 5 times.
Micropore corundum main function in the present invention reduces stress concentration, improves product to reduce product thermal conductivity Thermal shock resistance energy.ρ-Al2O3Micro mist main function improves the adhesion strength of product, while in situ raw at high temperature with magnesium aluminate Into spinelle, the thermal shock resistance energy and anti-scour property of product are improved；Synthetic spinel main function is to improve product to resist Scouring；Magnesium aluminate and the normal temperature strength that water main function is raising product.Therefore, obtained using the raw material proportioning of the present invention Steel non-carbon residue feather edge brick have the characteristics that pollution-free, normal temperature and elevated temperature strength be big, good thermal shock stability, low-carbon, ultralow can be met The production requirement of carbon steel.

Claims (8)

1. a kind of high-strength steel non-carbon residue feather edge brick, it is characterised in that including solid material and additive, the solid material is by weight Number, which calculates, includes following component：Micropore corundum in granules 120-135 parts, micropore schmigel 45-65 parts, ρ-Al2O3Micro mist 12-17 Part, xenotime 3-5 parts, synthetic spinel powder 20-35 parts, fine silica powder 3-7 parts and rear-earth-doped oxidation magnesium are partially stabilized Zirconium oxide micro mist 3-5 parts, the additive include combined binder and additive, and the dosage of the additive is total for solid material Weight 1-3%.
A kind of 2. high-strength steel non-carbon residue feather edge brick according to claim 1, it is characterised in that the micropore corundum in granules and micro- The mass percent of the chemical constituent of hole schmigel is：Al2O3Content >=98.5%, Fe2O3Content≤1.0%, K2O+ Na2O content≤0.8%, SiO2Content≤0.5%.
3. a kind of high-strength steel non-carbon residue feather edge brick according to claim 1, it is characterised in that the micropore corundum in granules is by two Kind grain composition is formed, and described two grain compositions and its weight percent content are：45% granularity is 1-3mm micropore corundum Particle, 55% granularity are 0.088-1mm micropore corundum in granules.
A kind of 4. high-strength steel non-carbon residue feather edge brick according to claim 1, it is characterised in that the grain of the synthetic spinel powder Spend and be for 180 mesh, the mass percent of its chemical constituent：Al2O3Content be 82%, MgO content be 18%.
A kind of 5. high-strength steel non-carbon residue feather edge brick according to claim 1, it is characterised in that the fine silica powder chemistry Composition requires SiO2>=95.0%, Particle size requirements≤1 μm.
6. a kind of high-strength steel non-carbon residue feather edge brick according to claim 1, it is characterised in that additive is superfine powdery Y- PSZ, the preparation process of the superfine powdery Y-PSZ are as follows：
A) the nitric hydrate yttrium of 18-22 parts six, the water basic zirconium chloride of 90-110 parts eight are codissolved in water, dilution is until zirconium ion rubs Your concentration is 0.054-0.056mol/L, obtains mixing salt solution；
B) 0.8-1.2 part surfactants are added into mixing salt solution a) obtained, ammoniacal liquor is added dropwise to it after uniform stirring, PH value is adjusted to 7.8-8.5, milky white precipitate is produced, obtains aqueous precipitating solution；
C) by aqueous precipitating solution b) obtained and petroleum ether with volume ratio 1：0.8-1.2 ratio mixing, mixed system is transferred to Stood in water and oil separator, until precipitation is all extracted in petroleum ether, discard its lower portion aqueous solution, retain organic molten Liquid；
D) precipitation is taken out from organic solution c) obtained, precipitation is dried after deionized water rinsing, dried after terminating Calcining obtains superfine powdery Y-PSZ under the conditions of being deposited in 750-850 DEG C.
A kind of 7. high-strength steel non-carbon residue feather edge brick according to claim 1, it is characterised in that the rear-earth-doped oxidation magnesium portion Divide the preparation process of stabilizing zirconia micro mist as follows：
A) by 94-95.5 part monocline phase zircites, 2.8-3.5 part fused magnesite fine powders, 1.3-2 part high alumina alum in terms of parts by weight Native micro mist, 0.18-0.25 parts praseodymium nitrate and the mixing of 0.18-0.25 parts lanthanum nitrate are after wet ball grinding under the conditions of 100-110 DEG C 40-50min is dried, obtains precursor powder；
B) 70-80min is calcined under the conditions of precursor powder a) obtained being placed in into 750-770 DEG C, air cools down to obtain adulterated powder；
C) powder is filtered out by adulterated powder b) obtained after distilled water immersion 3-5min with filter paper, powder is placed in 100- 40-50min is dried under the conditions of 110 DEG C, and rear-earth-doped oxidation magnesium PSZ micro mist is obtained after crossing 200 mesh sieves.
8. a kind of high-strength steel non-carbon residue feather edge brick according to claim 1, it is characterised in that combined binder and compound mineralization The mass ratio of agent is 1:1.2-1.5 combined binder is solid MgCl2·6H2O and MgCl2·6H2The O aqueous solution, solid MgCl2·6H2O and MgCl2·6H2The mass ratio of the O aqueous solution is 1:3, MgCl2·6H2O aqueous solution proportion is 1.5-1.65.
CN201710757105.5A 2017-08-29 2017-08-29 A kind of high-strength steel non-carbon residue feather edge brick Pending CN107512904A (en)

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